* Add new PluXml
The older pluxml_ynh seems to be unmaintained.
I propose this new script. It works with the last version of Pluxml (5.7). I have been able to install/upgrade/remove it. Package_check reports success to all check.
I set Level4 to na in check_process because PluXml does not support ldap/ssowat authentification.
I choose to set the state as "in progress", because I would like to have more feedback about this script.
This is the first time I make an application for yunohost, I would be happy if you can check that everything is ok.
```
Package linter: SUCCESS
Installation: SUCCESS
Deleting: SUCCESS
Installation in a sub path: SUCCESS
Deleting from a sub path: SUCCESS
Installation on the root: SUCCESS
Deleting from root: SUCCESS
Upgrade: SUCCESS
Installation in private mode: SUCCESS
Installation in public mode: SUCCESS
Multi-instance installations: SUCCESS
Malformed path: SUCCESS
Port already used: SUCCESS
Backup: SUCCESS
Restore: SUCCESS
Change URL: SUCCESS
grep: /home/admin/package_check/levels.json: Aucun fichier ou dossier de ce type
Level of this application: 3 ()
Level 1: 1
Level 2: 1
Level 3: 1
Level 4: 0
Level 5: 1
Level 6: 1
Level 7: 1
Level 8: 0
Level 9: 0
Level 10: 0
You can find the complete log of these tests in /home/admin/package_check/Complete.log
Global working time for all tests: 21 minutes, 13 seconds.
Disable iptables rules.
Disable the network bridge.
admin@domain:~$
```
* Please don't change the level yourself
* update pluxml_ynh
correct the url and revision
